Donald Trump "is going to go nuclear" Wednesday in his final debate with Hillary Clinton, most likely slamming her on her health and the WikiLeaks release of her State Department emails, journalist Edward Klein told Newsmax TV.

"He has no other choice," he told host Steve Malzberg on "America Talks Live" in an interview. "He's behind in the polls very significantly.

"He seems to be slipping, slipping, slipping — and unless he has a knock-out blow tonight, I think he can kiss this election goodbye."

"One possibility is going after Hillary's health," he told Malzberg, "because there's been a lot of talk regarding why it is that she seems to be fit as a fiddle when she's on stage and almost in a state of collapse behind the scenes.

Donald Trump "is going to go nuclear" Wednesday in his final debate with Hillary Clinton, most likely slamming her on her health and the WikiLeaks release of her State Department emails, journalist Edward Klein told Newsmax TV.